import os
import threading
import pyttsx3

class TTSService:
    _lock = threading.Lock()

    def __init__(self, lang='zh-CN'):
        self.lang = lang

    def text_to_audio(self, text: str, output_path: str) -> str:
        """将文本转换为WAV音频文件（使用pyttsx3）"""
        os.makedirs(os.path.dirname(output_path), exist_ok=True)

        with self._lock:
            engine = pyttsx3.init()
            try:
                # 设置中文语音
                voices = engine.getProperty('voices')
                for voice in voices:
                    if 'chinese' in voice.name.lower() or 'zh' in voice.id.lower():
                        engine.setProperty('voice', voice.id)
                        break

                # 设置语速
                engine.setProperty('rate', 150)

                # 保存为WAV
                engine.save_to_file(text, output_path)
                engine.runAndWait()

                return output_path
            finally:
                engine.stop()
                del engine